Finding the Fourth Proportional to 98,619.72, 147,907.98 and 28,483.80

Step by Step Solution

1. Step 1: Write the proportion equation
   98,619.72 : 147,907.98 = 28,483.80 : x
2. Step 2: Convert to fraction form
   98,619.72/147,907.98 = 28,483.80/x
3. Step 3: Cross multiply
   98,619.72x = 147,907.98 × 28,483.80
4. Step 4: Simplify right side
   98,619.72x = 4,212,981,320.72
5. Step 5: Solve for x
   x = 4,212,981,320.72/98,619.72
6. Step 6: Final answer
   x = 42,719.46